It is a good procedure, but it I have never seen anything similar.
The only thing I have seen is the TOGA and back to climb thing, but in the case of lower GA ALT, what to do?
Well, in MY humble opinion, what you have to do is
1st: continue descend on the glide or final approach.
2nd: inform ATC
3rd: follow ATC instructions
a) if instructions are vectors and altitudes, follow them
b) if instructions are follow missed approach procedure, then this is a curious situation! because, How do you string the missed approach procedure instead of sequencing the runway? You have to continue descend until go around altitude, then level off. You might just follow the go around procedure with heading and later insert lateral revisions and back to the runway, or you can select TOGA, then CLB, and push to level off immediately...